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Old dude, my Denali has the 6.2 LS motor too. I already swapped them and surging went away.
InFi, yeah I guess more of a hot oil smell but don’t smell it all the time. The thing is that I never noticed it until this year. I too do not have a catch can either.
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2012 L99 Convertible SS
Tooley Racing Stage 2 DOD delete, 3,200 stall converter, Shorty headers and custom stainless exhaust, CAI, and tune as mods
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